Biogenous weathering is visible on the surface of the sandstone. The lichen-dominated cryptoendolithic community contributes significantly to the weathering of the sandstone formations. Microbial activity increases the exfoliation of material from the surface of the rocks leading to the mosaic like pattern seen in this photo. A scale bar (each square is equal to 1cm) has been placed next to a section of rock that has been broken with a rock hammer, revealing the life which has colonized the interior of the rock.